Issues in final review

All,

I have marked all the "needs review" issues that either received positive
comments or are simple and received no comments as "final review".

You can see them all here:
https://github.com/w3c/webcrypto/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+label%3A%22final+review%22+

I will merge these changes tomorrow if there are no further comments.

...Mark